My Works
Present
Currently, I work as Sydney University U2000 Research Fellow at the Center of Advanced Material and Technology (CAMT), Department of Mechanical & Mechatronics Engineering, The University of Sydney from February 2000.
I had been working as a STA Research Fellow at the Strength and Life Evaluation Station, Frontier Research Center, National Research Institute for Metals (NRIM), Tsukuba Science City of Japan. from 9/1997-9/1999. I have just come back to Australia and currently visiting the Department of Civil Engineering, The University of Adelaide where I spent most of my time writting up the research that I have been carried out at NRIM.
For the last two years in Japan, I have been successfully carrying out research in a Japanese Government funded research project entitled "The Effect of Residual Stresses on Fatigue Behaviour of Large Welded Structures". Using Finite Element Method (FEM) and commercially available packages such as MARC and ABAQUS to build a 3D model for calculation of residual stresses of gusset welded joints subjected to various welding conditions, materials and procedures. The main work includes the computer simulation (Fortran 77), experimental works and writing up the research reports and papers.
This may sound boring to some of you but, in fact, this is one of the most challenging project I have ever been involved in during my whole career. It involves a lot of inter-disciplinary areas such as Structual Engineering, Mechanical Engineering, Welding Processes, Heat Transfer Engineering as well as Solid, Fracture Mechanics and Damage Mechanics. Furthermore, the potential application of this research in repair and maintenance of steel bridges could save hundred millions of dollars. Therefore, by working on this project, I have learned a lot from other people in my research team, and gradually I have improved and developed my skills in some of these areas too.
We have recently developed "Analytical Solutions for the Transient Temperature of Semi-Infinite Body Subjected to 3D Moving Heat Sources" such as Double-Ellipsoidal one. Using the obtained solutions we can be able to simulate the welding residual stresses due to welding material and sequences of multi-pass welds. The encouraging results of this project have already been published in August issue, 1999 of Welding Journal of American Welding Society.
Past Positions
Following are my past positions:
(i) Half a year working experience as a graduate mechanical engineer at Repair and Maintenance Section, Slovak’s Oil-Refinery Co. Ltd. SLOVNAFT in Bratislava from 9/1984 to 2/1985. Duties: Responsible for repair and maintenance of oil pumps and chemical pressure vessels.
(ii) Four and a half years academic teaching experience as a lecturer at Hanoi University of Technology from 1985 to 1989. Duties: Deliver 2 under-graduate subjects: (1) Fundamentals and Theory of Welding Engineering (2) Introduction to Mechanical Engineering and Manufacturing Technologies. Supervising several final-year students projects. Carrying out research in Welding Engineering (Aluminum-Thermic Welding and Non-ferious Bonding).
(iii) Half a year working experience at a multinational company "Jebson and Jesson Group of Companies, MHE-Thailand Co. Ltd.” as Senior Mechanical Designer from 9/1991 to 3/1992. Duties: Responsible for design of traveling girder cranes and good’s lift. Developed a computerized system for standardization of mechanical drawings of cranes parts and crane design using AUTOCAD drawing package.
(iv)Twenty months research experience as Post-doctoral research fellow at the Department of Civil & Environmental Engineering, The University of Adelaide. Duties: Carrying out advanced research in a project entitled “The Upgrade and Repair of Reinforce Concrete Beams using Externally Bonded Steel Plates” which is funded by an Australian Research Council Grant. That includes the computer simulation (using Fortran 77), experimental works and writing up research reports and papers.
(v)Two year research experience as STA Post-doctoral research fellow at the National Research Institute for Metals (NRIM) , Tsukuba Science city, Ibaraki, Japan. Duties: Carrying out advanced research in a project for Fatigue Assessment of Large Welded Welded Structures and Effect of Residual Stresses. /p>